The message of Christianity is reconciliation! (2 Cor. 5:20) This is what every Christian has been given through faith alone by God's grace alone in Christ alone (Eph. 2:8-9). You have been reconciled to God and that is the message that we need to live out - a reconciliation to God and to one another no matter our ethnicity.
Yet because of sin, racism sticks its ugly head out in a variety of ways. Racism is a sin. It destroys unity and the oneness Jesus prays for in John 17. Racism distorts the image of God that all have been created by.
Below are some free resources to educate yourself on the issue of racism:
For further study on racial unity and biblical diversity click below